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Finite-size corrections to quantized particle transport in topological charge pumps

Finite-size corrections to quantized particle transport in topological charge pumps

We investigate the quantization of adiabatic charge transport in the insulating ground state of finite systems. Topological charge pumps are used in experiments as an indicator of topological order. In the thermodynamic limit the transport can be related to a topological Berry phase and is thus strictly quantized. This is …